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Correlation
of % moves
-40%
In sync
of periods
55%
History
monthsmonths · through 2026-05
58
These move in the same direction about 55% of the time
Their swing sizes only faintly mirror each other (~16% of the pattern is shared).
Roughly random — these don't track each other in a meaningful way.
On a log scale so equal % moves take equal vertical space — best when one series has grown much faster than the other.
What to Watch
Flips between sync and inverse
Sometimes the two move together, sometimes opposite. Don't treat this as a stable signal.
Advanced
Statistics
In sync(i)
55%
Headline metric
Movement correlation(i)
-40%
Based on % moves
95% CI
N/A
Pipeline
Pipeline Summary
58 paired data points survived the monthly window.
Raw input
1,254
952
Normalized
1,254
952
Prepared
61
952
Aligned
58
58
Invalid removed
Likely range
R²(i)
16%
Variance explained
Significance
N/A
Statistical confidence
Data points(i)
56
Thin
Time-Shifted Correlation
See how correlation changes when one series is offset in time. A taller bar at a non-zero shift means the two move together better when one leads the other — that's a potential lead/lag signal.
Correlation by shift
Click a bar to inspect. Range: -18 to 18 months.
Selected shift
No shift
Correlation at this shift
-40%
No shift — both series at their actual dates.
56 overlapping points at this shift
Baseline
-40%
No-shift correlation, matching the main time-series chart above.
Peak shift
No shift
-40%
A non-zero peak suggests one series lines up better when shifted against the other.
Stability
How the correlation evolves over time. A stable line means the relationship is reliable; large swings signal regime-dependent behavior.
Do They Crash Together?
How these series behave when markets are rising, falling, or diverging. A correlation that holds in drawdowns is very different from one that only works in rallies.
Both Rising
-23%
31 periods · Return correlation when both series rose
Both Falling
N/A
0 periods · Return correlation when both series fell
Diverging
-12%
25 periods · Return correlation when series moved apart
Scatter
0
A: 0 / B: 0
Duplicates removed
0
A: 0 / B: 0
Alignment drops
897
A: 3 / B: 894
Series A
Boston Scientific Corp. (BSX)
BSX
Stock · 1,254 raw → 61 prepared
Series B
US CPI
CPIAUCSL
FRED · 952 raw → 952 prepared
Sign agreement
100.0%
How often both values share the same sign.
Zero crossings
3
Estimated crossover points between normalized spreads.
Slope
-0.0196
Linear regression slope.
Intercept
0.0037
Linear regression intercept.
Saved 3 months ago · ID: fred-cpiaucsl_stock-bsx_monthly_5y